22812140 has 24 divisors (see below), whose sum is σ = 51591120. Its totient is φ = 8422848.

The previous prime is 22812107. The next prime is 22812149. The reversal of 22812140 is 4121822.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (22812149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43610 + ... + 44129.

It is an arithmetic number, because the mean of its divisors is an integer number (2149630).

Almost surely, 2^22812140 is an apocalyptic number.

22812140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22812140 is an abundant number, since it is smaller than the sum of its proper divisors (28778980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22812140 is a wasteful number, since it uses less digits than its factorization.

22812140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87761 (or 87759 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 22812140 is about 4776.2056069646. The cubic root of 22812140 is about 283.6103066260.

Adding to 22812140 its reverse (4121822), we get a palindrome (26933962).

The spelling of 22812140 in words is "twenty-two million, eight hundred twelve thousand, one hundred forty".